31901643796 has 48 divisors (see below), whose sum is σ = 64261552320. Its totient is φ = 13704768000.

The previous prime is 31901643737. The next prime is 31901643827. The reversal of 31901643796 is 69734610913.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 306636 + ... + 397276.

It is an arithmetic number, because the mean of its divisors is an integer number (1338782340).

Almost surely, 2^31901643796 is an apocalyptic number.

It is an amenable number.

31901643796 is an abundant number, since it is smaller than the sum of its proper divisors (32359908524).

31901643796 is a wasteful number, since it uses less digits than its factorization.

31901643796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91096 (or 91094 counting only the distinct ones).

The product of its (nonzero) digits is 734832, while the sum is 49.

The spelling of 31901643796 in words is "thirty-one billion, nine hundred one million, six hundred forty-three thousand, seven hundred ninety-six".